Bella Vista Middle: math

The shaded band is this school's normal range. If nothing about how it works changes, nearly every future year should land inside it. Zero means the typical student just meets the state standard. The small numbers under the years are how many students were tested.

Measured against the grade bars

The state's math test uses one scale for every grade, so a score means the same thing in grade 3 as in grade 8.

6th The average 6th grader scores 13 points under the grade 5 bar. 2515 vs. 2528. The 6th-grade bar is 2552.
7th The average 7th grader scores just under the grade 7 bar. 2559 vs. 2567.
8th The average 8th grader scores just under the grade 8 bar. 2583 vs. 2586.

2026 results. "Meets standard" is the state's mark for being on track for that grade.

Step 1 · Each year's result

For each grade tested, take the average (mean) scale score from the California Department of Education's results file, and subtract the lowest score that counts as "Standard Met" for that grade. That is the grade's distance from standard. Weight each grade by its share of the students tested, then add the grades up. Grades where the state hides the average because ten or fewer students tested are left out entirely.

2015 from sb_ca2015_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	59,158	2530.5	− 2552	−21.5	× 400 / 1147	−7.5
7	59,161	2536.6	− 2567	−30.4	× 391 / 1147	−10.4
8	59,162	2582.2	− 2586	−3.8	× 356 / 1147	−1.2
Sum, rounded to a whole point						−19

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	54,905	2552.2	− 2552	0.2	× 414 / 1225	0.1
7	54,908	2543.9	− 2567	−23.1	× 393 / 1225	−7.4
8	54,909	2578.9	− 2586	−7.1	× 418 / 1225	−2.4
Sum, rounded to a whole point						−10

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	56,508	2550.1	− 2552	−1.9	× 430 / 1261	−0.6
7	56,511	2574.2	− 2567	7.2	× 420 / 1261	2.4
8	56,513	2581.3	− 2586	−4.7	× 411 / 1261	−1.5
Sum, rounded to a whole point						0

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	56,608	2548.5	− 2552	−3.5	× 466 / 1350	−1.2
7	56,610	2556.1	− 2567	−10.9	× 445 / 1350	−3.6
8	56,612	2607.3	− 2586	21.3	× 439 / 1350	6.9
Sum, rounded to a whole point						2

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	56,866	2540.1	− 2552	−11.9	× 470 / 1324	−4.2
7	56,867	2572.2	− 2567	5.2	× 444 / 1324	1.7
8	56,868	2592.6	− 2586	6.6	× 410 / 1324	2
Sum, rounded to a whole point						0

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	56,946	2528.6	− 2552	−23.4	× 436 / 1337	−7.6
7	56,947	2539.9	− 2567	−27.1	× 460 / 1337	−9.3
8	56,948	2561.8	− 2586	−24.2	× 441 / 1337	−8
Sum, rounded to a whole point						−25

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	56,911	2525.7	− 2552	−26.3	× 448 / 1343	−8.8
7	56,912	2550.6	− 2567	−16.4	× 439 / 1343	−5.4
8	56,913	2573.0	− 2586	−13	× 456 / 1343	−4.4
Sum, rounded to a whole point						−19

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	56,797	2523.8	− 2552	−28.2	× 376 / 1270	−8.3
7	56,798	2542.4	− 2567	−24.6	× 444 / 1270	−8.6
8	56,799	2581.4	− 2586	−4.6	× 450 / 1270	−1.6
Sum, rounded to a whole point						−19

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	56,553	2538.7	− 2552	−13.3	× 368 / 1170	−4.2
7	56,554	2543.0	− 2567	−24	× 362 / 1170	−7.4
8	56,555	2576.2	− 2586	−9.8	× 440 / 1170	−3.7
Sum, rounded to a whole point						−15

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	56,494	2514.8	− 2552	−37.2	× 356 / 1095	−12.1
7	56,495	2558.9	− 2567	−8.1	× 375 / 1095	−2.8
8	56,496	2582.8	− 2586	−3.2	× 364 / 1095	−1.1
Sum, rounded to a whole point						−16

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −19, −10, 0, 2, 0, −25, −19, −19, −15, −16 → −12.1
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 9 · 2016→2017: 10 · 2017→2018: 2 · 2018→2019: 2 · 2019→2022: 25 · 2022→2023: 6 · 2023→2024: 0 · 2024→2025: 4 · 2025→2026: 1 → average 6.6
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 6.6 × 2.66 = 17.6. Upper limit 5.5, lower limit −29.7.

Why 2.66? It is the standard factor from quality control, the work of Walter Shewhart and W. Edwards Deming. It turns "how much the result typically changes in a year" into "how far it can wander by chance alone".

Years with no result (no state tests were given in spring 2020) are skipped: the year-to-year change runs from the last year with a result to the next one.

Step 3 · Free or reduced-price meals

The share of enrolled students eligible for free or reduced-price meals. From 2014–15, 2015–16, 2016–17, 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.